520549864 has 32 divisors (see below), whose sum is σ = 988433280. Its totient is φ = 256984704.

The previous prime is 520549849. The next prime is 520549879. The reversal of 520549864 is 468945025.

It is an interprime number because it is at equal distance from previous prime (520549849) and next prime (520549879).

It is a self number, because there is not a number n which added to its sum of digits gives 520549864.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313324 + ... + 314980.

It is an arithmetic number, because the mean of its divisors is an integer number (30888540).

Almost surely, 2^520549864 is an apocalyptic number.

It is an amenable number.

520549864 is a deficient number, since it is larger than the sum of its proper divisors (467883416).

520549864 is a wasteful number, since it uses less digits than its factorization.

520549864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2137 (or 2133 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The square root of 520549864 is about 22815.5618821891. The cubic root of 520549864 is about 804.4284944783.

The spelling of 520549864 in words is "five hundred twenty million, five hundred forty-nine thousand, eight hundred sixty-four".